Movatterモバイル変換

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JS compat
ECMAScript562016+nextintlnon-standardcompatibility table
bykangax &webbedspace &zloirock
This table shows proposals which have not yet been included in the current ECMAScript standard, but are at one of the maturity stages of theTC39 process.
V8SpiderMonkeyJavaScriptCoreChakraOther
⬤ Minor difference (1 point)⬤ Small feature (2 points)⬤ Medium feature (4 points)⬤ Large feature (8 points)
Compilers/polyfillsDesktop browsersServers/runtimesMobile
Feature nameCurrent browserTraceurBabel 6 +
core-js 2		Babel 7 +
core-js 2		Babel 7 +
core-js 3		Closure 2020.09Closure 2021.08Closure 2021.09Closure 2021.10Closure 2021.11Closure 2022.05Closure 2022.07Closure 2023.02Type-
Script +
core-js 2		Type-
Script +
core-js 3		Type-
Script +
core-js 3		Type-
Script +
core-js 3		Type-
Script +
core-js 3		Type-
Script +
core-js 3		Type-
Script +
core-js 3		FF 115 ESRFF 128 ESRFF 134FF 135FF 136FF 137FF 138FF 139FF 140 ESRFF 141FF 142FF 143FF 144FF 145FF 146FF 147FF 148FF 149OP 12.10CH 133CH 134CH 135CH 136CH 137CH 138CH 139CH 140CH 141CH 142CH 143CH 144CH 145CH 146Edge 133Edge 134Edge 135Edge 136Edge 137Edge 138Edge 139Edge 140Edge 141Edge 142Edge 143Edge 144Edge 145SF 15.6SF 17.5SF 17.6SF 18SF 18.1SF 18.2SF 18.3SF 18.4SF 18.5SF 26SF TPWKOP 102OP 103OP 104OP 105OP 106OP 107OP 108OP 109OP 110OP 111OP 112Rhino 1.7.15Rhino 1.8.0Rhino 1.9.0PJSNode >=18.3 <19Node >=20 <21Node >=22 <23Node >=23 <24Node >=24Node >=25DUK 2.6DUK 2.7GraalVM 19.3.1[3]GraalVM 19.3.6[3]GraalVM 20.0.0[3]GraalVM 20.1.0[3]GraalVM 20.3.0[3]GraalVM 20.3.1[3]GraalVM 21.0.0[3]GraalVM 21.3.3[4]GraalVM 22.2.0[4]GraalVM 25.0.1Hermes 0.12.0Deno 1.33Deno 1.34Deno 1.35Deno 1.36AN 4.4AN 4.4.3iOS 12.2iOS 13.4iOS 14.5iOS 16.6iOS 17.0iOS 17.1iOS 17.2iOS 17.3iOS 17.4iOS 17.5iOS 17.6iOS 18.0iOS 26.0Samsung 24Samsung 25Samsung 26Samsung 27Opera Mobile 72Opera Mobile 73Opera Mobile 74Opera Mobile 75Opera Mobile 76Opera Mobile 77React Native 0.70.3 (Hermes + Babel)
Stage 3
§Class and Property Decorators0/10/10/10/10/10/10/10/10/10/10/10/11/11/11/11/11/11/11/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/1
§class decorators?No[5]No[5]No[5]????????YesYesYesYesYesYesYesNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§Legacy RegExp features in JavaScript0/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/20/20/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/22/2
§RegExp "lastMatch"MDN (Mozilla Development Network) logo ???????????????????YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes
§RegExp.$1-$9MDN (Mozilla Development Network) logo ???????????????????YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes
§Uint8Array to/from base64 and hex0/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/66/66/66/66/66/66/66/66/66/66/66/66/66/66/66/66/60/60/60/60/60/60/60/60/60/66/66/66/66/66/66/60/60/60/60/60/60/60/60/66/66/66/66/66/60/60/60/60/60/66/66/66/66/66/66/66/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/66/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/60/66/60/60/60/60/60/60/60/60/60/60/60/6
§Uint8Array.toBase64()MDN (Mozilla Development Network) logo ???????????????????NoFlag[6]YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes?NoNoNoNoNoNoNoNoYesYesYesYesYesYesNoNoNoNoNoNoNoNoYesYesYesYesYes?????YesYesYesYesYesYesYes????????????NoNo????NoNoYes?????????NoNoFlag[7]???????????????????Yes???????????
§Uint8Array.fromBase64()MDN (Mozilla Development Network) logo ???????????????????NoFlag[6]YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes?NoNoNoNoNoNoNoNoYesYesYesYesYesYesNoNoNoNoNoNoNoNoYesYesYesYesYes?????YesYesYesYesYesYesYes????????????NoNo????NoNoYes?????????NoNoFlag[7]???????????????????Yes???????????
§Uint8Array.setFromBase64()MDN (Mozilla Development Network) logo ???????????????????NoFlag[6]YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes?NoNoNoNoNoNoNoNoYesYesYesYesYesYesNoNoNoNoNoNoNoNoYesYesYesYesYes?????YesYesYesYesYesYesYes????????????NoNo????NoNoYes?????????NoNoFlag[7]???????????????????Yes???????????
§Uint8Array.toHex()MDN (Mozilla Development Network) logo ???????????????????NoFlag[6]YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes?NoNoNoNoNoNoNoNoYesYesYesYesYesYesNoNoNoNoNoNoNoNoYesYesYesYesYes?????YesYesYesYesYesYesYes????????????NoNo????NoNoYes?????????NoNoFlag[7]???????????????????Yes???????????
§Uint8Array.fromHex()MDN (Mozilla Development Network) logo ???????????????????NoFlag[6]YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes?NoNoNoNoNoNoNoNoYesYesYesYesYesYesNoNoNoNoNoNoNoNoYesYesYesYesYes?????YesYesYesYesYesYesYes????????????NoNo????NoNoYes?????????NoNoFlag[7]???????????????????Yes???????????
§Uint8Array.setFromHex()MDN (Mozilla Development Network) logo ???????????????????NoFlag[6]YesYesYesYesYesYesYesYesYesYesYesYesYesYesYesYes?NoNoNoNoNoNoNoNoYesYesYesYesYesYesNoNoNoNoNoNoNoNoYesYesYesYesYes?????YesYesYesYesYesYesYes????????????NoNo????NoNoYes?????????NoNoFlag[7]???????????????????Yes???????????
§Explicit Resource Management0/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/88/88/88/88/88/88/88/88/88/80/80/87/87/87/87/87/87/87/88/88/88/88/88/88/80/87/87/87/87/87/87/87/88/88/88/88/88/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/87/88/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/80/8
§using???????????????????NoNoFlag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]YesYesYesYesYesYesYesYesYes??YesYesYesYesYesYesYesYesYesYesYesYesYes?YesYesYesYesYesYesYesYesYesYesYesYes????????NoNoNoNo?????????????No?????YesYes?????????NoNoNo???????????????????No???????????
§for (using ... of???????????????????NoNoFlag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]YesYesYesYesYesYesYesYesYes??YesYesYesYesYesYesYesYesYesYesYesYesYes?YesYesYesYesYesYesYesYesYesYesYesYes????????NoNoNoNo?????????????No?????YesYes?????????NoNoNo???????????????????No???????????
§await using???????????????????NoNoFlag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]YesYesYesYesYesYesYesYesYes??YesYesYesYesYesYesYesYesYesYesYesYesYes?YesYesYesYesYesYesYesYesYesYesYesYes????????NoNoNoNo?????????????No?????YesYes?????????NoNoNo???????????????????No???????????
§for (await using ... of???????????????????NoNoFlag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]YesYesYesYesYesYesYesYesYes??YesYesYesYesYesYesYesYesYesYesYesYesYes?YesYesYesYesYesYesYesYesYesYesYesYes????????NoNoNoNo?????????????No?????YesYes?????????NoNoNo???????????????????No???????????
§Symbol.dispose with bound function????????????????????????????YesYesYesYesYesYesYesYesYes????????NoYesYesYesYesYesYes???????NoYesYesYesYesYes?????????????????????????No?????NoYes???????????????????????????????????????????
§SuppressedError???????????????????NoNoFlag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]YesYesYesYesYesYesYesYesYes??YesYesYesYesYesYesYesYesYesYesYesYesYes?YesYesYesYesYesYesYesYesYesYesYesYes????????NoNoNoNo?????????????No?????YesYes?????????NoNoNo???????????????????No???????????
§DisposableStack???????????????????NoNoFlag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]YesYesYesYesYesYesYesYesYes??YesYesYesYesYesYesYesYesYesYesYesYesYes?YesYesYesYesYesYesYesYesYesYesYesYes????????NoNoNoNo?????????????No?????YesYes?????????NoNoNo???????????????????No???????????
§AsyncDisposableStack???????????????????NoNoFlag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]Flag[8]YesYesYesYesYesYesYesYesYes??YesYesYesYesYesYesYesYesYesYesYesYesYes?YesYesYesYesYesYesYesYesYesYesYesYes????????NoNoNoNo?????????????No?????YesYes?????????NoNoNo???????????????????No???????????
Stage 2.7
§ShadowRealm???????????????????Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]Flag[9]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§Map.prototype.upsert0/20/20/22/20/20/20/20/20/20/20/20/20/22/22/22/22/22/22/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/20/2
§Map.prototype.upsert?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§WeakMap.prototype.upsert?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
Stage 2
§Generator function.sent Meta Property?YesYesYes???????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§throw expressions0/40/44/44/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/40/4
§logical??YesYes???????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§parameter initializers??YesYes???????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§arrow function bodies??YesYes???????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§conditionals??YesYes???????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§Array.isTemplateObject?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§Async Iterator Helpers0/170/170/1717/170/170/170/170/170/170/170/170/170/1717/1717/1717/1717/1717/1717/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/170/17
§instanceof AsyncIterator?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§extends AsyncIterator?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.from, async iterable?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.from, iterable?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.from, iterator?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.drop?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.every?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.filter?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.find?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.flatMap?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.forEach?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.map?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.reduce?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.some?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.take?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype.toArray?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoFlag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]Flag[13]?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo
§AsyncIterator.prototype[@@toStringTag]?NoNoYes[10]?????????[11]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]Yes[12]NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNo????????????NoNoNoNoNoNoNoNoNoNoNoNoNoNo?NoNoNoNoNoNoNoNo???????NoNoNoNoNoNoNoNo???????????????NoNoNoNoNoNoNoNoNoNoNo

[1] Flagged features have to be enabled via--harmony flag

[2] Flagged features have to be enabled via--harmony or--es_staging flag

[3] Executed in Node.js/JVM mode viagraalvm/bin/node --jvm.

[4] Executed usingjs --js.intl-402.

[5] Babel 6 still has no official support decorators, but you can usethis plugin.

[6] The feature has to be enabled viajavascript.options.experimental.uint8array_base64 setting underabout:config.

[7] Requires the--js.ecmascript-version=staging flag.

[8] The feature is only available on Nightly builds, and has to be enabled viajavascript.options.experimental.explicit_resource_management setting underabout:config.

[9] The feature has to be enabled viajavascript.options.experimental.shadow_realms setting underabout:config.

[10] This feature is supported when using Babel withcore-js.

[11] TypeScript's compiler will accept code using this feature if the--target ES6 flag is set, but passes it through unmodified and does not supply a runtime polyfill.

[12] This feature is supported when using TypeScript withcore-js.

[13] The feature is only available on Nightly builds, and has to be enabled viajavascript.options.experimental.async_iterator_helpers setting underabout:config.





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